London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
City of London 1901
[Report of the Medical Officer of Health for Port of London]
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Table showing the results of experiments of feeding rats on materials mixed with Danysz bacillus.
| Date. | Material used. | How used. | Remarks. | Result. | |
|---|---|---|---|---|---|
| 1901. | |||||
| April 23" | 24 tubes Dr. Danysz Rat Virus. | Mixed with bread and laid on floors of warehouse. | April 24: | Bread laid down previous day eaten. | Negative. |
| „ 26 | April 27: | Negative. | |||
| „ 30 | May 1: | Negative. | |||
| May 3 | May 4: | Negative. | |||
| „ 8 | 24 tubes ditto | Ditto ditto. | May 10: Bread eaten. | Negative. | |
| „ 11 | Ditto ditto. | May 13: Ditto. | Negative. | ||
| „ 15 | Mixed with water and laid ou floor in tins. | May 16: Water not drunk by rats. | Negative. | ||
| „ 16 | Mixed with bread and laid on floor of warehouse. | May 17: Bread eaten. | Negative. | ||
| „ 22 | 12 tubes ditto | Ditto ditto. | May 24: | Ditto. | Negative. |
| „ 25 | Ditto ditto. | May 26: | Ditto. | Negative. | |
| „ 28 | Ditto ditto. | May 29: | Ditto. | Negative. | |
| „ 31 | Ditto ditto. | June 3: | Ditto. | Negative. | |
| June 14 | 5 guinea - pigs dead after subcutaneous injection with Danysz culture. | Laid on floors of warehouse. | June 15: 4 guinea-pigs eaten. June 17: 1 guinea-pig eaten. | Negative. | |
| „ 26 | 22 mice dead after subcutanneous injection with Danysz culture. | Ditto ditto. | June 27: 9 mice eaten. June 28:9 mice eaten. | Negative. | |
| „ 27 | June 29: 1 mouse eaten. July 1: 3 mice eaten. | ||||
| July 15 | 4 guinea-pigs and 1 rat dead after subcutaneous injection with Danysz virus. | Ditto ditto. | June 16: 3 guinea-pigs eaten. June 17: 1 guinea - pig eaten. July 19: rat untouched; being putrid was burnt. | Negative. | |
| „ 17 | 8 guinea - pigs dead after subcutaneous injection with Danysz virus. | Ditto ditto. | July 18: 2 guinea-pigs eaten. 19: 1 eaten. 20: remaining guinea pigs found untouched and full of maggots, therefore were burnt. | Negative. | |
Negative means that no dead rats have been found, and there has not been noticed
any diminution in the number of rats, as evidenced by tracks, damage, dung, &c.